DE69528108D1 - System für optischen Kopf - Google Patents

System für optischen Kopf

Info

Publication number
DE69528108D1
DE69528108D1 DE69528108T DE69528108T DE69528108D1 DE 69528108 D1 DE69528108 D1 DE 69528108D1 DE 69528108 T DE69528108 T DE 69528108T DE 69528108 T DE69528108 T DE 69528108T DE 69528108 D1 DE69528108 D1 DE 69528108D1
Authority
DE
Germany
Prior art keywords
optical head
head system
optical
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69528108T
Other languages
English (en)
Other versions
DE69528108T2 (de
Inventor
Ryuichi Katayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE69528108D1 publication Critical patent/DE69528108D1/de
Publication of DE69528108T2 publication Critical patent/DE69528108T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1367—Stepped phase plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE69528108T 1994-05-17 1995-05-17 System für optischen Kopf Expired - Fee Related DE69528108T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6102409A JP2655077B2 (ja) 1994-05-17 1994-05-17 光ヘッド装置

Publications (2)

Publication Number Publication Date
DE69528108D1 true DE69528108D1 (de) 2002-10-17
DE69528108T2 DE69528108T2 (de) 2003-06-05

Family

ID=14326649

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69528108T Expired - Fee Related DE69528108T2 (de) 1994-05-17 1995-05-17 System für optischen Kopf

Country Status (4)

Country Link
US (1) US5600614A (de)
EP (1) EP0683484B1 (de)
JP (1) JP2655077B2 (de)
DE (1) DE69528108T2 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0713216B1 (de) * 1994-11-15 2001-10-17 Nec Corporation Optischer Kopf unter Verwendung der Hyperauflösungstechnik
US5708648A (en) * 1995-05-31 1998-01-13 Nec Corporation Optical head apparatus including light focusing and refocusing lens systems
JP2748906B2 (ja) * 1995-10-13 1998-05-13 日本電気株式会社 光学ヘッド装置
JPH09180240A (ja) * 1995-12-21 1997-07-11 Hitachi Ltd 光ヘッド
DE69726527T2 (de) * 1996-03-18 2004-09-23 Seiko Epson Corp. Optischer kopf und optisches aufzeichnungsgerät
JPH1055565A (ja) * 1996-04-26 1998-02-24 Daewoo Electron Co Ltd 光ピックアップ装置
JP2910689B2 (ja) * 1996-06-20 1999-06-23 日本電気株式会社 光ヘッド
US6275461B1 (en) 1996-08-29 2001-08-14 Samsung Electronic Co., Ltd. Optical pickup using an optical phase plate
KR100263154B1 (ko) * 1996-08-29 2000-09-01 윤종용 광학적 위상판을 사용한 광픽업
US6222812B1 (en) 1996-08-29 2001-04-24 Samsung Electronics Co., Ltd. Optical pickup using an optical phase plate
TW307007B (en) * 1996-09-24 1997-06-01 Ind Tech Res Inst Digital video disc pick-up head
JP2818405B2 (ja) * 1996-10-18 1998-10-30 三星電子株式会社 波長板を具備した光ピックアップ装置
JPH10188322A (ja) * 1996-12-26 1998-07-21 Nec Corp 光ヘッド
US6639889B1 (en) 1997-02-13 2003-10-28 Samsung Electronics Co., Ltd. Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats
US6304540B1 (en) 1998-03-30 2001-10-16 Samsung Electronics Co., Ltd. Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
JP3554844B2 (ja) * 1998-03-19 2004-08-18 富士通株式会社 光磁気ヘッド装置
US6721258B1 (en) 1999-06-21 2004-04-13 Citizen Watch Co., Ltd. Optical device for super-resolution
JP2005100476A (ja) * 1999-11-01 2005-04-14 Matsushita Electric Ind Co Ltd 光学ヘッド
JP4903300B2 (ja) * 2000-07-31 2012-03-28 旭硝子株式会社 光学装置
US6404722B1 (en) * 2000-08-01 2002-06-11 Ritek Corporation Method of increasing recording density and capacity of a compact disc
JP2003091865A (ja) * 2001-09-20 2003-03-28 Minebea Co Ltd 記録媒体の情報再生及び記録装置
JP4362068B2 (ja) * 2002-02-26 2009-11-11 パナソニック株式会社 光学素子及びそれを用いた光ヘッド装置、並びに、この光ヘッド装置を用いた光情報装置、並びに、この光情報装置を用いたコンピュータ、光ディスクプレーヤ、カーナビゲーションシステム、光ディスクレコーダ及び光ディスクサーバ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0834012B2 (ja) * 1988-06-14 1996-03-29 日本電気株式会社 光ヘッド装置及び情報記録再生方法
JP2638086B2 (ja) * 1988-06-14 1997-08-06 日本電気株式会社 光ヘッド装置及び情報記録再生方法
DE68924303T2 (de) * 1988-06-14 1996-02-29 Nec Corp Optische Kopfanordnung.
US5072437A (en) * 1988-09-19 1991-12-10 Pioneer Electronic Corporation Optical information reproducing apparatus
JPH0572497A (ja) * 1991-09-11 1993-03-26 Sharp Corp 一体型光素子および基板型光素子
JP3068340B2 (ja) * 1991-09-30 2000-07-24 株式会社東芝 集光装置
WO1993016469A1 (en) * 1992-02-07 1993-08-19 Sony Corporation Phase varying device, and optical pickup apparatus using the same for magneto-optical storage
JPH05225602A (ja) * 1992-02-14 1993-09-03 Alps Electric Co Ltd 光ヘッド装置
US5349592A (en) * 1992-02-27 1994-09-20 Kabushiki Kaisha Toshiba Super-resolution optical element for use in image forming apparatus
JP3077426B2 (ja) * 1992-12-14 2000-08-14 日本電気株式会社 光情報記録再生装置
JPH07141681A (ja) * 1993-11-18 1995-06-02 Ricoh Co Ltd 光ヘッド

Also Published As

Publication number Publication date
EP0683484B1 (de) 2002-09-11
US5600614A (en) 1997-02-04
EP0683484A1 (de) 1995-11-22
DE69528108T2 (de) 2003-06-05
JPH07311969A (ja) 1995-11-28
JP2655077B2 (ja) 1997-09-17

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee